CVE-2026-90307: Linux kernel · RDMA/srp: fix heap information leak on a truncated SRP_CRED_REQ
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 17 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix has been implemented to validate buffer sizes and drop truncated requests, preventing out-of-bounds reads and information leaks. Users should apply the official Linux kernel patches that address this issue. Since this is a kernel vulnerability, updating to a patched kernel version is the recommended remediation. Patch status is not explicitly confirmed in the provided data; users should consult their Linux distribution or vendor advisories for the appropriate fixed kernel versions.
Description
A heap information leak vulnerability in the Linux kernel's RDMA/srp subsystem has been resolved. The flaw involves improper validation of buffer sizes when processing SRP_CRED_REQ and SRP_AER_REQ requests, leading to out-of-bounds reads that leak 8 bytes of kernel heap memory per response. This occurs because fixed-size fields are read from buffers without confirming the fields were fully received, potentially exposing sensitive kernel memory contents. The issue affects specific Linux kernel versions and was detected by KASAN as a slab-out-of-bounds read.
References
- ubuntu.com/security/CVE-2026-90307 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-90307 (opens in a new tab)
- git.kernel.org/linus/961ac0f0c5e414abdd6b33fae84b311d9fde0bd0 (opens in a new tab)
- msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-90307.json (opens in a new tab)
- support.microsoft.com/lifecycle (opens in a new tab)
- first.org/cvss (opens in a new tab)